One morning, as Nikomaru is getting ready for school, Akitakomachi shows up at his door carrying a lost  baby named Rinx Kobayashi. Akitakomachi says he found the baby in a rice cooker on his way to school. The two of them decide to take care of Rinx Kobayashi together, and through much trial and error, they try their hardest to be good parents.
I know better than anyone how 
hard it is to have no parents.
أنا خير من يعرف كم من الصّعب 
.عدم امتلاك أبوين
Ich weiß am besten, wie es ist,
keine Eltern zu haben.
Comprendo lo difícil
que es no tener padres,
Comprendo lo difícil
que es no tener padres,
C’est dur de ne pas avoir de parents,
je suis le premier à le savoir.
So meglio di chiunque altro
quanto sia difficile essere orfani.
Eu sei melhor do que ninguém
 como é difícil não ter pais.
Я лучше других знаю,
каково жить без родителей.